|
|
| Author |
Message |
A1CR
Site Admin
Joined: 18 Jan 2006
Posts: 559
|
 Posted: Wed Feb 08, 2006 8:14 am Post subject: Caloric Restriction Extends Spider Lifespan |
 |
|
above: Frontinella pyramitela, the bowl and doily spider ... one of many animal species for which science has proven the lifespan-extending effects of calorie restriction.
A striking example of the evolutionary conservation of the response to CR is a study by Austad, conducted using bowl and doily spiders. He compared the longevity of the spiders in the field to that of captive spiders fed different numbers of fruit flies per week. Adult female spiders lived about 8 days in the field. However, in the protected environment of the laboratory, the mean adult lifespan was 42.3, 63.9, and 81.3 days when they were fed five, three, and one flies per day. This study affirms that even for spiders, the powerful mechanisms of CR operate on lifespan.
References:
(1) Life extension by dietary restriction in the bowl and doily spider, Frontinella pyramitela.
Exp Gerontol. 1989;24(1):83-92.
PMID: 2707314 [PubMed - indexed for MEDLINE]
| Quote: |
| Longevity of free-living female adult bowl and doily spiders was compared with that of captive spiders fed at dietary regimes of one, three, and five Drosophila melanogaster per week. Adult females lived, on average, only 8 days in the field and the pattern of survivorship showed no evidence that senescence contributed to mortality. In the laboratory, mean adult life span was 81.3, 63.9, and 42.3 days on the one, three, and five Drosophila diets, respectively. Decreased feeding rate also delayed egg laying and reduced total fecundity. Survival and reproductive patterns indicated the manifestation of spider senescence at all laboratory feeding levels, with a younger onset of senescence at the higher feeding rates. |
(2) Caloric Restriction, Longevity and the Search for Authentic Anti-Aging Drugs.
Stephen R. Spindler
Anti-Aging Therapy for Plastic Surgery, Kinney B. & Carraway J. (Eds.), Quality Medical Publishing, Inc., St. Louis. (2003)
http://www.biomarkerinc.com/assets/pdfs/BMPREF4.pdf
Personal note:
While I've known about the study above for some time, I was prompted to finally post on this topic after noticing (and photographing) a related species from my back yard in Gardena, California:
above: Latrodectus mactans, the Black Widow spider, photographed 2006-02-07. |
|
| Back to top |
|
 |
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
|
|
Search
Log in
